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#!/bin/sh
# Ensure "df --total" computes accurate totals
# Copyright (C) 2008-2020 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
print_ver_ df
require_perl_
# Protect against inaccessible remote mounts etc.
timeout 10 df || skip_ "df fails"
cat <<\EOF > check-df || framework_failure_
my ($total, $used, $avail) = (0, 0, 0);
while (<>)
{
$. == 1
and next; # skip first (header) line
# Recognize df output lines like these:
# /dev/sdc1 0 0 0 - /c
# tmpfs 1536000 12965 1523035 1% /tmp
# total 5285932 787409 4498523 15% -
/^(.*?) +(-?\d+|-) +(-?\d+|-) +(-?\d+|-) +(?:-|[0-9]+%) (.*)$/
or die "$0: invalid input line\n: $_";
if ($1 eq 'total' && $5 eq '-')
{
$total == $2 or die "$total != $2";
$used == $3 or die "$used != $3";
$avail == $4 or die "$avail != $4";
my $line = <>;
defined $line
and die "$0: extra line(s) after totals\n";
exit 0;
}
$total += $2 unless $2 eq '-';
$used += $3 unless $3 eq '-';
$avail += $4 unless $4 eq '-';
}
die "$0: missing line of totals\n";
EOF
# Use --block-size=512 to keep df from printing rounded-to-kilobyte
# numbers which wouldn't necessarily add up to the displayed total.
df --total -P --block-size=512 > space || framework_failure_
cat space # this helps when debugging any test failure
df --total -i -P > inode || framework_failure_
cat inode
$PERL check-df space || fail=1
$PERL check-df inode || fail=1
test "$fail" = 1 && dump_mount_list_
Exit $fail
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